ISPRS
2000
Recognising
- that natural test-sites were successfully used for cali-
bration of certain sensors
- that high-precision models for radiation transfer
through the atmosphere exist
- that the geometric laboratory calibrated parameters
need to be confirmed or updated in orbit by inflight cal-
ibration methods using large area testsites with highly
accurate ground truth
- that highly accurate geometric calibration of digital
camera systems places high demands on the labora-
tory calibration equipment and that this task is costly
and time-consuming
- that varying geometric calibration concepts for differ-
ent digital camera systems exist, showing different
accuracy characteristics
Recommends
- investigations of calibration and inter-calibration of all
optical imaging space sensors
- that all existing and planned test-fields be identified
and characterised
- that collaboration be established with other bodies
studying ground test fields with known spectral
reflectance characteristics, which can be used for cal-
ibration
Swath Sensors
Resolution 1.3
The Congress
Noting
- that swath systems, e.g. SPOT Vegetation, IRS, WiFS,
Sea WiFS, MODIS, etc, are now available with various
spectral and spatial resolution
- that such systems' response is subject to bidirectional
reflection factor, sun angle, etc. due to wide swath
Recognising
- that this data could be used to study long-term
changes, especially in vegetative cover
Recommends
- Studies to understand the effect of viewing geometry
on the radiometric accuracy of the products.
Sensors for DTM Data Generation
Resolution 1.4
The Congress
Noting
- that a number of optical systems specifically to gener-
ate DTM are planned for the future
- that interferometric SAR has proved its capability to
generate DTM
- that Airborne laser systems are operational
- that substantial parts of the world still do not have
topographic maps of desired scale and accuracy
Recognising
182 _
- the need that terrain height / slope is an important
parameter for many applications of remote sensing data
Recommends
- detailed study on the accuracy and cost effectiveness
of various techniques
- identification of standard sites for intercomparison and
evaluation of different methods
Resolution 1.5: Work with CEOS
The Congress
Noting
- that the Committee on Earth Observation Satellites
(CEOS) has accorded Affiliate position to ISPRS;
- that coordination of EO missions and allied activities
(like calibration / validation activities; application activ-
ities; EO information services activities; EO education
and training activity etc.) are the major aims of CEOS
and ISPRS and could mutually gain by working
together.
Recognising:
- the need to strengthen international coordination of EO
missions
- the need to bring together the government and private
sector in various EO activities - space, ground and util-
isation segments
Recommends
- ISPRS actively work with CEOS towards bringing co-
operation and coordination of EO programme activities
- ISPRS work with CEOS to foster public/private collab-
oration in EO activities;
- |SPRS support and contribute to the EO education and
training efforts worldwide and specifically focus on
newer technology elements;
- Support and focus on emergence of IGOS as a major
international endeavour
1.6 Platform and Orientation Integration
The Congress
Noting
- that the capability of the current earth observation sys-
tem to provide high resolution images
- and the availability of modern technology such as dif-
ferential GPS and high-precision attitude sensing and
orientation systems.
Recognising
- the potential use of high-resolution data for field level
application
- and the need for high-precision location accuracy of
the data
Recommends
- Smart integration of attitude and position infomation
with data processing software algorithm
- Standardisation of data format, referencing system and
data archival and retrieval system.
International Archives of Photogrammerty and Remote Sensing. Vol. XXXIII, Part A. Amsterdam 2000.
